The only thing that helps pore size are invasive treatments like lasers or Dermarolling. No products/lotions will help, unfortunately. If you're going to have treatment for your actual scarring then expect to see improvement in your pores as well. I've always had gross pores but ever since Dermarolling I can honestly say that they're much smaller and I get less blackheads as a result. Bonus!

I would personally tackle your scarring first and foremost, and then, if your pores haven't improved (which will be unlikely) you can look at treatment options for that.